The utility model relates to a mini spinning, filtering and defoaming device comprising a material storing tank, a filtering assembly, a nitrogen gas cylinder and a vacuum pump, wherein the material storing tank is of a hollow cylindrical container, and the inner wall of the material storing tank is provided with a heat-insulating outer layer thickened gradually from top to bottom so that a conical filtering-cavity chamber is formed in the material storing tank; a material storing tank cover seals and is fixedly arranged on the upper part of the material storing tank, and the lower end of the material storing tank is connected with the filtering assembly through a connection channel; and an outer pressure interface and a vacuum air extracting hole are arranged on the material storing tank cover, the outer pressure interface is connected with the nitrogen gas cylinder through a connection pipe A, and the vacuum air extracting hole is connected with a vacuum pump through a connection pipe B. The mini spinning, filtering and defoaming device disclosed by the utility model has the characteristics of small floor area, low cost, simplicity and convenience in operation and the like so as to be suitable for a small-scale experiment in a laboratory and solve problems that the floor area of the device is overlarge and is unlikely to being arranged, the experiment cost is overhigh, the operation is complex and the like caused by the absence of the mini spinning, filtering and defoaming device suitable for the laboratory in the prior art.